Rotordynamic fluid forces acting on cavitating inducer in whirling motion

Authors :: Yoshida, Yoshiki
Eguchi, Masato
Motomura, Taiichi
Uchiumi, Masaharu
Kure, Hirotaka
Maruta, Yoshiyuki
Source :: 宇宙航空研究開発機構研究開発資料 = JAXA Research and Development Memorandum.
Publication Year :: 2009
Publisher :: 宇宙航空研究開発機構, 2009.
Abstract: To investigate the relationship of the uneven cavity length and rotordynamic force in a cavitating inducer with three blades, the rotordynamic fluid forces acting on cavitating and whirling inducer were examined by using a rotordynamic test stand with active magnetic bearings. Rotordynamic performances were obtained within a wide range of cavitation numbers (sigma) and whirl(omega)/shaft(Omega) speed ratios included super-synchronous/synchronous/sub-synchronous rotating cavitation. These experimental results indicate that the rotating cavitation strongly affects the fluid reaction forces. The fluid reaction forces act on the inducer as a destabilizing forces at a certan cavitation number and whirl/shaft speed ratio.<br />形態: カラー図版あり<br />Physical characteristics: Original contains color illustrations<br />資料番号: AA0064454000<br />レポート番号: JAXA-RM-09-004